AIK stood low and Hammarby high at Friends Arena, where the team is faced with empty stands in an important derby.
The guests pressed for a lead goal, but with 27 minutes played, Paulos Abraham found Nabil Bahoui.
From a free position in the penalty area, Bahoui made no mistake.
He widened in 1-0 to AIK, who need a victory in the bottom battle.
The match is in progress.